1.1 The result of the expression 7 MOD 5 + 10 DIV 3:
A
B
C
D
1.1.2 A digital signature is used …
A when someone signs an electronic document - NSC Information Technology - Question 1 - 2017 - Paper 2
Question 1
1.1 The result of the expression 7 MOD 5 + 10 DIV 3:
A
B
C
D
1.1.2 A digital signature is used …
A when someone signs an electronic document.
B to ident... show full transcript
Worked Solution & Example Answer:1.1 The result of the expression 7 MOD 5 + 10 DIV 3:
A
B
C
D
1.1.2 A digital signature is used …
A when someone signs an electronic document - NSC Information Technology - Question 1 - 2017 - Paper 2
Step 1
The result of the expression 7 MOD 5 + 10 DIV 3:
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Answer
To solve the expression, we first calculate each part:
Calculate 7 MOD 5:
The remainder when 7 is divided by 5 is 2.
Calculate 10 DIV 3:
The integer division of 10 by 3 gives 3 (since 10 divided by 3 equals 3 with a remainder of 1).
Finally, add the two results together:
2 + 3 = 5.
Thus, the answer is D.
Step 2
A digital signature is used …
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Answer
A digital signature is primarily used to identify the sender of an electronic message (option B). It ensures the integrity and authenticity of the sender.
Step 3
A Trojan virus is designed to …
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Answer
A Trojan virus is designed to appear useful while actually causing harm, therefore, the correct answer is D.
Step 4
A technique used to make electronic communication appear to originate from a legitimate source is known as …
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Answer
This technique is referred to as spoofing (option B), which involves impersonating a legitimate source.
Step 5
To establish a relationship between two tables in a database, a link must be made from the …
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Answer
The link must be made from the primary key to the foreign key (option D) to maintain referential integrity.
Step 6
The amount of data an ISP allows a user to upload and download in a particular time period
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Answer
This is known as a CAP/Data bundle.
Step 7
A website that is regularly updated with news and events in chronological order
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Answer
Such a website is referred to as a Blog/Weblog.
Step 8
A person who breaks into a system to steal data electronically or to make unauthorized changes to electronic data
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Answer
This person is commonly known as a Cracker/Hacker.
Step 9
An Internet service that translates a domain name to an IP address, e.g. www.abcd.com translates to 169.150.100.123
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This service is known as DNS (Domain Name System).
Step 10
The protocol used for secure encrypted transfer of data on the Internet
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Answer
This protocol is referred to as HTTPS/SSL.
Step 11
The process whereby the existing firmware is wiped and replaced by an updated version
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Answer
This process is known as flashing the ROM.
Step 12
An Internet-based alternative to text messaging, in which multimedia can be exchanged in real time via applications, such as WhatsApp
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Answer
This is referred to as Instant messaging (IM).
Step 13
A common format for storing digital music by combining efficient compression techniques and good quality sound
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This format is known as MP3 (MPEG-1 Audio Layer 3).
Step 14
Gaining unauthorized access to a network and making use of a connection in an unauthorized way to access a secured Wi-Fi network
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Answer
This practice is known as Piggybacking.
Step 15
The process of self-checking by a computer when it is powered on
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Answer
This process is known as POST (Power-on self-test).
